Excavator



FIG. 1 is a perspective view of the excavator showing our new design;

FIG. 2 is a right side view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a back view of thereof; and,

FIG. 6 is a top view thereof.

The broken lines shown in the drawings are included for purposes of illustrating portions of the excavator and form no part of the claimed design. 

CLAIM The ornamental design for an excavator, as shown and described. 